[chloggen] Use go embed to embed the template file

.chloggen/use-go-embed-for-chloggen-template.yaml

@@ -0,0 +1,16 @@
+# One of 'breaking', 'deprecation', 'new_component', 'enhancement', 'bug_fix'
+change_type: enhancement
+
+# The name of the component, or a single word describing the area of concern, (e.g. crosslink)
+component: chloggen
+
+# A brief description of the change.  Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: Use go embed to embed the template file in chloggen
+
+# One or more tracking issues related to the change
+issues: [224]
+
+# (Optional) One or more lines of additional information to render under the primary note.
+# These lines will be padded with 2 spaces and then inserted directly into the document.
+# Use pipe (|) for multiline entries.
+subtext:

chloggen/internal/chlog/context.go

@@ -18,7 +18,6 @@ import (
 	"fmt"
 	"os"
 	"path/filepath"
-	"runtime"
 )
 
 const (
@@ -65,12 +64,3 @@ func RepoRoot() string {
 	}
 	return dir
 }
-
-func moduleDir() string {
-	_, filename, _, ok := runtime.Caller(0)
-	if !ok {
-		// This is not expected, but just in case
-		fmt.Println("FAIL: Could not determine module directory")
-	}
-	return filepath.Dir(filename)
-}

chloggen/internal/chlog/summary.go

@@ -16,12 +16,15 @@ package chlog
 
 import (
 	"bytes"
+	_ "embed"
 	"fmt"
-	"path/filepath"
 	"sort"
 	"text/template"
 )
 
+//go:embed summary.tmpl
+var tmpl []byte
+
 type summary struct {
 	Version         string
 	BreakingChanges []string
@@ -61,13 +64,11 @@ func GenerateSummary(version string, entries []*Entry) (string, error) {
 }
 
 func (s summary) String() (string, error) {
-	summaryTmpl := filepath.Join(moduleDir(), "summary.tmpl")
-
 	tmpl := template.Must(
 		template.
 			New("summary.tmpl").
 			Option("missingkey=error").
-			ParseFiles(summaryTmpl))
+			Parse(string(tmpl)))
 
 	buf := bytes.Buffer{}
 	if err := tmpl.Execute(&buf, s); err != nil {

chloggen/internal/chlog/summary_test.go

@@ -0,0 +1,59 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package chlog
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func Test_SummaryString(t *testing.T) {
+	s := summary{
+		Version:         "1.0",
+		BreakingChanges: []string{"foo", "bar"},
+		Deprecations:    []string{"foo", "bar"},
+		NewComponents:   []string{"foo", "bar", "new component"},
+		Enhancements:    []string{},
+		BugFixes:        []string{"foo", "bar", "foobar"},
+	}
+	result, err := s.String()
+	assert.NoError(t, err)
+	assert.Equal(t, `
+## 1.0
+
+### 🛑 Breaking changes 🛑
+
+foo
+bar
+
+### 🚩 Deprecations 🚩
+
+foo
+bar
+
+### 🚀 New components 🚀
+
+foo
+bar
+new component
+
+### 🧰 Bug fixes 🧰
+
+foo
+bar
+foobar
+`, result)
+}